physical education. n. (Education) training and practice in sports, gymnastics, etc, as in schools and colleges. Abbreviation: PE. physâ²ical educaâ²tion. n. instruction in sports, exercise, and hygiene, esp. as part of a school or college program.
3. Stress/injury. Stress on the tissues or any type of injury in the mouth can cause canker sores. Since the sores are actually tiny ulcers, they can be caused by any kind of hard brushing or eating something that can cause bruises or lead to tissue inflammation in the mouth.
Stress/Injury. Any stress or injury located inside your mouth may be the root cause of a canker sore formation. Anything from brushing too hard, biting your gums, harsh mouthwashes, or eating something that causes bruising can lead to the tiny ulcers.If you are susceptible to canker sores, also try avoiding toothpastes and mouthwashes that contain sodium lauryl sulfate.nything from brushing too hard, biting your gums, harsh mouthwashes, or eating something that causes bruising can lead to the tiny ulcers. If you are susceptible to canker sores, also try avoiding toothpastes and mouthwashes that contain sodium lauryl sulfate.